ATA6631-EK Microchip

ATA6629/ATA6631 LIN Bus Transceiver with Integrated Voltage Regulator DATASHEET Features Supply voltage up to 40V Operating voltage V = 5V to 27V S Typically 10A supply current during sleep mode Typically 35A supply current in silent mode Linear low-drop voltage regulator, 85mA current capability: Normal, fail-safe, and silent mode Atmel ATA6629: V = 3.3V 2% CC Atmel ATA6631: V = 5.0V 2% CC Sleep mode: V is switched off CC V undervoltage detection with reset open drain output NRES (4ms reset time) CC Voltage regulator is short-circuit and over-temperature protected LIN physical layer according to LIN 2.0, 2.1 and SAEJ2602-2 Wake-up capability via LIN bus (90s dominant) TXD time-out timer Bus pin is overtemperature and short-circuit protected versus GND and battery Advanced EMC and ESD performance Fulfills the OEM hardware requirements for LIN in automotive applications rev.1.1 Interference and damage protection according to ISO7637 Package: SO8 9165F-AUTO-10/141. Description Atmel ATA6629/ATA6631 is a fully integrated LIN transceiver, designed according to the LIN specification 2.0, 2.1 and SAEJ2602-2, with a low-drop voltage regulator (3.3V/5V/85mA). The combination of voltage regulator and bus transceiver makes it possible to develop simple, but powerful, slave nodes in LIN bus systems. ATA6629/ATA6631 is designed to handle the low-speed data communication in vehicles (for example, in convenience electronics). Improved slope control at the LIN driver ensures secure data communication up to 20kBaud. The bus output is designed to withstand high voltage. Sleep mode and silent mode guarantee minimized current consumption even in the case of a floating or a short circuited LIN-bus. Figure 1-1. Block Diagram 1 VS Atmel ATA6629/ATA6631 V CC 5k Normal and RXD Receiver 5 Fail-safe Mode - + 4 LIN RF-filter V CC Wake-up bus timer Short-circuit and overtemperature protection Slew rate control TXD TXD 6 Time-out timer 8 VCC Sleep EN 7 2 NRES Normal/Silent/ mode Control Fail-safe Mode VCC unit 3.3V/5V switched GND 3 off Undervoltage reset 2 ATA6629/ATA6631 DATASHEET 9165FAUTO10/14